Forge version: (SERVER: forge-1.12-14.21.1.2443 CLIENT: 1.12.2-forge-14.23.5.2854)

Twilight Forest version: (twilightforest-1.12.2-3.10.1013-universal)

Link to crash log: There isn't really a crash it more or less just becomes unplayable I guess?

Steps to reproduce:

1. I have these mods installed (twilightforest-1.12.2-3.10.1013-universal, Pam's+HarvestCraft+1.12.2zg, IronBackpacks-1.12.2-3.0.8-12,furniture-6.3.1-1.12.2 )
2. I turned the server on

and connected to it
3. I made the portal jumped in it and killed myself inside (Either through the command or just natural)

What I expected to happen:
I was hoping to respawn maybe and continue playing the game

What happened instead:
Game glitches out, Can't move, and cant reconnect to the server

This sounds more like the server is still in the process of world generation which causes everything to stall until complete. You could use the phosphor mod to help speed this process up.

This doesn't really sound like a bug on our end, and could potentially be world generation still processing. If this issue still persists, feel free to open this again.